Ventilating apparatus



c. -B.' SCHNEIBLE ,247,891

VENTILATING APPARATUS 7 Filed July 13, 1939 July 1,

an. Aw 6 I i d y M:: 7 A a m v VQQQ W, a a. wmiwia m 2v 0 G G A Patented July 1, 1941 UiTE VENTILATING APPARATUS Claude B. Schneible, Chicago, Ill.

Application July 3, 1939, Serial No. 284,321

9 Claims.

,- This invention relates to ventilating apparatus.

It is useful in manufacturing operations, and particularly in rooms or chambers where the removal of fumes, dust, and other undesirable foreign particles or materials is desired.

An object of the invention is to provide a chamber provided with a means for carrying a direct flow of air therethrough with substantially the elimination of eddy currents. A further object is to provide means whereby a chamber is ven- I tilated by direct flow for bringing about the removal of undesirable or injurious fumes, dust, and other foreign particles. A still further object is to provide means for cleansing the walls and other areas of paint, foreign particles, etc.

A still further object is to provide means for the protection of specially equipped ventilating walls through which the flow of air and particleor fume-laden air passes. Other specific objects and advantages will appear as the specification proceeds.

The invention is illustrated, in a preferred embodiment, by the accompanying drawing, in which- Figure l is a longitudinal sectional view of a l chamber ventilated in accordance wtih my invention; Fig. 2, a broken plan View of a portion of one of the ventilating walls; Fig. 3, an enlarged detail sectional view, the section being taken as indicated at line 3 of Fig. 2; and Fig. l, a longitu- 3i dinal sectional View of a modified form of chamber embodying my invention.

In the illustration given, a chamber A is formed by a casing wall lil extending under the top and sides and a rear hood casing H. ing i l is provided with a drawoff conduit I2 leading to a suitable source of suction. The bottom wall of the chamber is provided by the floor of the building, usually concrete. If desired, a continuation of the casing for forming the floor may i be employed. The front end of the chamber is formed by a ventilating wall i3. At the rear of the casing It and just in front of the hood II is a ventilating wall l4.

Each of the walls 53 and hi provides a plurality F of ventilating openings 15 which are shown uniformly distributed over the wall.

The Walls l4 and 13 are preferably formed from a pair of spaced metal sheets, each of the sheets having inwardly drawn tubular portions which form the openings, the tubular portions of the two sheets being held in telescoping relation. For example, in Fig. 3, the wall it is provided on its outer side with inwardly drawn tubular nozzles or portions IS.

The hood cas- The inner sheet is provided with i inwardly drawn tubular portions or nozzles I 1. It will be noted that the two tubular members providing the opening i5 are telescopically engaged near their central portions. The two sheets are secured in thisrelationship by spot welding or other suitable means. It will be noted that the flow of air is not interrupted because the inner tube portion H is smaller than the tubular portion l6 and there is presented no obstructing edge.

Since the sweep of air is toward the wall I 4, it is desirable to protect the wall as much as possible to prevent the accumulation of obstructing material thereon. For example, in paint spraying operations,the air current. carries paint and fumes toward the wall M and in time there is built up an obstructing cake over Wall l4 reducing the flow passages. The same result is found with other operations in which foreign particles are drawn toward the wall M. To overcome this, I have found that waxed paper funnels l8 can be drawn into each of the tubular openings, lying over the tubes ll. Each of the funnel members l8 has an inward portion of restricted diameter and an outwardly flared portion IS, the outwardly flared portion being sufiicient to prevent the paper members from being drawn through the openings. By this means, it will be seen that the surface of the wall I 4 is very well protected by removable elements, the elements providing good protection about each of the openings through which the air is drawn. Thus, after a painting operation, the surface of wall I 4 can be readily cleared by jerking the various cups out of position and throwing them away.

In the event that dust or other abrasive particles arebe-ing drawn through the wall M, I may employ, instead of waxed paper funnels, rubber, steel, Bakelite, etc, cups. The rubber cups provide a resiilent wall. The removable rubber liners prevent the dust from striking and abrading the metal walls and greatly increase their life. When worn, they can be readily removed and new rubber sleeves l8 substituted.

In the operation of the structure shown in Figs. 1, 2 and 3, the painting, dust forming, or other operation contemplated, is carried on within the chamber or room A. Air is drawn through the pipe l2 so that fresh air enters through the perforated wall it and passes out of the Wall M.

After the operation or at any suitable time, the wall 14 may be cleaned by removing the members l8. In the case of abrasive, the members It need not be removed until they have worn to the extent that it is desired to replace them.

While I have shown the ventilating walls l3 and M each formed of double sheets with telescoping tubes, it will be understood that a single sheet may be employed with the tubular portions drawn therein.

In the modified structure shown in .Fig. 4, the structure is identical with that shown in Fig. 1, except that the hood member 29 is provided with an upwardly flared rear wall communicating with a suction pipe 2 l The inclined rearwall 20 is equipped at its top with a plurality of nozzles 22 through which water or other cleansing fluid is flowed to clear the wall. An inclined trough 23 at the bottom of the hood carries away the wash fluid.

While in the foregoing description, I have set forth certain specific details and steps which illustrate a method or structure. embodying the invention, it will be understood that such details and steps may be widely varied without departing from .the spirit of my invention.

I wish it to be understood that-I do not desire 1 to be-limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

I claim:

1. In ventilating apparatus of the class set forth, a casing having an open end and a pipe opposite said open end, said pipe being adapted to be connected to a source of suction, a pair of perforated parallel walls, oneof which extends acrossthe open end of said casingand the other across the end of the-opposite sideof said casing and adjacent said suction pipe, said walls provid- 111g be ventilated by the passage of air through said perforated walls, and removable shielding means about the openings of said perforated walls.

2. In ventilating apparatus of the character set forth, a casing having an air inlet opening and an outlet opening therein whereby air may pass through said casing, a perforated wall extending across said inlet opening, a second. perforated wall extending across said casing adjacent said outlet, and removale guard members having enlarged portions on the inner side of said second wall and having tubular portions extending into the openings of said second-mentioned wall.

3. In ventilating apparatusof the character set forth, a casing equipped with an inlet opening and having an outlet opening whereby air may pass through said casing, a perforated wall extending across said inlet opening,.a second perforated wall extending in front of said outlet opening,. and funnel-shaped paper guards extending partially through the openings of said secondmentioned wall and having enlarged portions lying against the inner face of said wall.

between them a working chamber adapted to 4. Ventilating apparatus for use with abrasive and the like, comprising a casing having an inlet opening therein for receiving air into the casing and an outlet opening at the opposite side thereof for discharging air from the casing, a perforated Wall extending across the said outlet opening and a second perforated wall extending across said outlet opening, and resilient guard members lying against the inner surface of said second-mentioned wall and having tubular portions extending into the openings of said wall.

5. In ventilating apparatus of the class set forth, a casing having an inlet opening, a perforated wall extending across said inlet opening and a second perforated wall at the opposite side of said casing, a hood forming an enclosure to the rear of said second perforated wall and providing a rear upwardly inclined surface, and means for discharging fluid along said inclined surface and for withdrawing the same at the bottom of the hood.

6. In ventilating apparatus of the class set forth, a casing having an open inlet end, a perforated wall extending across said end, a second perforated wall at-the opposite end of said casing, a hood behind said second-mentioned wall and providing near its top a suction pipe, said hood having a wall inclining downwardly and inwardly from said suction pipe, a drawoff portion at the lower end of said hood, and means for discharging fluid along said inclined hood wall.

'7. In ventilating apparatus, a casing providing a chamber having an inlet and outlet, a perforated wall extending across said outlet, and removable guard cups having portions extending partially through the openings of said wall.

8. In ventilating apparatus of the class set forth, a casing having an inlet opening, a perforated wall extending across said inlet opening and a second perforated wall at the opposite side of said casing, a hood forming an enclosure to the'rear of said second-mentioned wall and providing a rear upwardly inclined surface, removable guard cups engaging said second-mentioned perforated wall and having portions extending into openings therein, and means for discharging fluid along said inclined surface and for withdrawing the same.

9. In ventilating apparatus of the class set forth, a casing having an opening inlet end, a perforated wall extending across said end, a second perforated wall at the opposite end of said casing, guard cups engaging openings of at least one of said walls, a hood behind said secondmentioned wall and providing near its top a suction pipe, said hood having a wall inclined downwardly and inwardly from said suction pipe, a drawoff at the lower end of said hood, and means for discharging fluid along said inclined hood Wall.

CLAUDE B. SCI-INEIBLE.

CERTIFICATE OF CORRECTION. Patent No. 2,2 7,891; July 1; 19in,

( CLAUDE 'SCHNEIBLE.

It is hereby certified that error appears in the printed specification of the above numbered patent requiringtcor'rectionas follows: Page 1, second co1umn, line liO for "resiilent" read -'resi1ient--; page 2, first-c01- umn, line 50,"c1aim 2, for-"remova1e"- read -remevable-'; s ame nage, second column, line 6, claim-1L, for the word "outlet" read "inletand that the said Letters Patent should be read with this "correction therein that the same" ma y coni orm to the record ofthevca se in the Patent Office.

Signed and sealed this 25rd day of September, A D. 1911.1.

I Henry Van. Arsdale, (Sealf v Acting Commissioner ofi Patents. 

